Alaska Railroad 
Arrow 
ACCOUNTING RATE OF RETURN 
Arrive 
Association for Radiation Research 
Airborne Radio Relay 
Andoya Rocket Range 
Anti-Repeat Relay 
Arrange 
arrangement 
Array 
Arrival 
Attributes for Representing Relationsh… 
Average Rate of Return 
absolute risk reduction 
Academia Republicii Romania 
Academy of Radiology Research 
accelerating rotarod 
Accounting and Reporting Recommendatio… 
Action Request Report 
Address Range Register 
Address Range Registrers 
Address Record Register 
Adjustable Reset Response 
adjusted relative risk 
adjusted relative risks 
Air Armenia 
Air Reconnaissance Request 
Airborne Radio Receivers 
Airborne release rate